US PATENT SUBCLASS 137 / 402
.~.~ Gravitating tank

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


137 /   HD   FLUID HANDLING

386  DF  LIQUID LEVEL RESPONSIVE OR MAINTAINING SYSTEMS {11}
400  DF  .~ With supplemental or safety closing means or bias {2}
402.~.~ Gravitating tank

DEFINITION

Classification: 137/402

(under subclass 400) Apparatus wherein the supplemental closing bias or means responds to or is actuated by a gravitating tank.

SEE OR SEARCH THIS CLASS, SUBCLASS:

403+, for level control by means of the weight of accumulated liquid, and see especially the search notes to subclass 408.